[feature] Add a request ID and include it in logs (#1476)

This adds a lightweight form of tracing to GTS. Each incoming request is
assigned a Request ID which we then pass on and log in all our log
lines. Any function that gets called downstream from an HTTP handler
should now emit a requestID=value pair whenever it logs something.

Co-authored-by: kim <grufwub@gmail.com>

internal/db/bundb/basic.go

@@ -165,6 +165,6 @@ func (b *basicDB) IsHealthy(ctx context.Context) db.Error {
 }
 
 func (b *basicDB) Stop(ctx context.Context) db.Error {
-	log.Info("closing db connection")
+	log.Info(ctx, "closing db connection")
 	return b.conn.Close()
 }